Stock Compensation Plans (Stock Options Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options outstanding at beginning of year	92,499	201,674	523,973
Options granted	0	0	0
Options exercised	(89,499)	(107,575)	(101,649)
Options canceled	0	(1,600)	(220,650)
Options outstanding and exercisable at end of year	3,000	92,499	201,674
Options exercised	$ 10.63	$ 12.25	$ 11.51
Options canceled	$ 0.00	$ 11.80	$ 22.60
Options outstanding and exercisable at end of year	$ 12.41	$ 10.69	$ 11.53
Cash received from options exercised (in thousands)	$ 951	$ 1,318	$ 2,179
Intrinsic value of options exercised (in thousands)	1,349	1,279	1,006
Intrinsic value of options outstanding (in thousands)	$ 35	$ 1,393	$ 2,217